151405440 has 64 divisors (see below), whose sum is σ = 482610960. Its totient is φ = 40374272.

The previous prime is 151405379. The next prime is 151405487. The reversal of 151405440 is 44504151.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (64).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 151405440.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 37509 + ... + 41348.

Almost surely, 2^151405440 is an apocalyptic number.

151405440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

151405440 is an abundant number, since it is smaller than the sum of its proper divisors (331205520).

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

151405440 is an equidigital number, since it uses as much as digits as its factorization.

151405440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78879 (or 78867 counting only the distinct ones).

The product of its (nonzero) digits is 1600, while the sum is 24.

The square root of 151405440 is about 12304.6917880945. The cubic root of 151405440 is about 532.9835762369.

Adding to 151405440 its reverse (44504151), we get a palindrome (195909591).

The spelling of 151405440 in words is "one hundred fifty-one million, four hundred five thousand, four hundred forty".