152423440 has 80 divisors (see below), whose sum is σ = 385319088. Its totient is φ = 55738368.

The previous prime is 152423437. The next prime is 152423473. The reversal of 152423440 is 44324251.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 7750656 + 144672784 = 2784^2 + 12028^2 .

It is a tau number, because it is divible by the number of its divisors (80).

It is a super-2 number, since 2×152423440² = 46465810122867200, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 116872 + ... + 118168.

Almost surely, 2^152423440 is an apocalyptic number.

152423440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 152423440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (192659544).

152423440 is an abundant number, since it is smaller than the sum of its proper divisors (232895648).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

152423440 is a wasteful number, since it uses less digits than its factorization.

152423440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1436 (or 1430 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 25.

The square root of 152423440 is about 12345.9888222856. The cubic root of 152423440 is about 534.1754439489.

Adding to 152423440 its reverse (44324251), we get a palindrome (196747691).

It can be divided in two parts, 1524 and 23440, that added together give a square (24964 = 158²).

The spelling of 152423440 in words is "one hundred fifty-two million, four hundred twenty-three thousand, four hundred forty".