148393440 has 144 divisors (see below), whose sum is σ = 545414688. Its totient is φ = 36523008.

The previous prime is 148393433. The next prime is 148393463. The reversal of 148393440 is 44393841.

It is a tau number, because it is divible by the number of its divisors (144).

It is a super-2 number, since 2×148393440² = 44041226070067200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 148393395 and 148393404.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 14757 + ... + 22683.

It is an arithmetic number, because the mean of its divisors is an integer number (3787602).

Almost surely, 2^148393440 is an apocalyptic number.

148393440 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 148393440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (272707344).

148393440 is an abundant number, since it is smaller than the sum of its proper divisors (397021248).

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

148393440 is a wasteful number, since it uses less digits than its factorization.

148393440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7961 (or 7950 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 36.

The square root of 148393440 is about 12181.6846125649. The cubic root of 148393440 is about 529.4255553706.

The spelling of 148393440 in words is "one hundred forty-eight million, three hundred ninety-three thousand, four hundred forty".