155400432 has 40 divisors (see below), whose sum is σ = 437948160. Its totient is φ = 47090880.

The previous prime is 155400389. The next prime is 155400433. The reversal of 155400432 is 234004551.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155400433) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 146632 + ... + 147687.

It is an arithmetic number, because the mean of its divisors is an integer number (10948704).

Almost surely, 2^155400432 is an apocalyptic number.

155400432 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

155400432 is an abundant number, since it is smaller than the sum of its proper divisors (282547728).

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

155400432 is a wasteful number, since it uses less digits than its factorization.

155400432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 294341 (or 294335 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 24.

The square root of 155400432 is about 12465.9709609801. The cubic root of 155400432 is about 537.6307172252.

Adding to 155400432 its reverse (234004551), we get a palindrome (389404983).

The spelling of 155400432 in words is "one hundred fifty-five million, four hundred thousand, four hundred thirty-two".