153402440 has 16 divisors (see below), whose sum is σ = 345155580. Its totient is φ = 61360960.

The previous prime is 153402421. The next prime is 153402449. The reversal of 153402440 is 44204351.

It can be written as a sum of positive squares in 2 ways, for example, as 152720164 + 682276 = 12358^2 + 826^2 .

It is not an unprimeable number, because it can be changed into a prime (153402449) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1917491 + ... + 1917570.

Almost surely, 2^153402440 is an apocalyptic number.

153402440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

153402440 is an abundant number, since it is smaller than the sum of its proper divisors (191753140).

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

153402440 is a wasteful number, since it uses less digits than its factorization.

153402440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3835072 (or 3835068 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 23.

The square root of 153402440 is about 12385.5738663980. The cubic root of 153402440 is about 535.3166553515.

Adding to 153402440 its reverse (44204351), we get a palindrome (197606791).

The spelling of 153402440 in words is "one hundred fifty-three million, four hundred two thousand, four hundred forty".