155404940 has 12 divisors (see below), whose sum is σ = 326350416. Its totient is φ = 62161968.

The previous prime is 155404927. The next prime is 155404943. The reversal of 155404940 is 49404551.

It is a junction number, because it is equal to n+sod(n) for n = 155404897 and 155404906.

It is not an unprimeable number, because it can be changed into a prime (155404943) 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, 3885104 + ... + 3885143.

It is an arithmetic number, because the mean of its divisors is an integer number (27195868).

Almost surely, 2^155404940 is an apocalyptic number.

155404940 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

155404940 is an abundant number, since it is smaller than the sum of its proper divisors (170945476).

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

155404940 is a wasteful number, since it uses less digits than its factorization.

155404940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7770256 (or 7770254 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 32.

The square root of 155404940 is about 12466.1517718982. The cubic root of 155404940 is about 537.6359158719.

The spelling of 155404940 in words is "one hundred fifty-five million, four hundred four thousand, nine hundred forty".