155578940 has 24 divisors (see below), whose sum is σ = 356417712. Its totient is φ = 56574080.

The previous prime is 155578933. The next prime is 155578957. The reversal of 155578940 is 49875551.

155578940 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is a junction number, because it is equal to n+sod(n) for n = 155578891 and 155578900.

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, 353369 + ... + 353808.

It is an arithmetic number, because the mean of its divisors is an integer number (14850738).

Almost surely, 2^155578940 is an apocalyptic number.

155578940 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

155578940 is an abundant number, since it is smaller than the sum of its proper divisors (200838772).

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

155578940 is a wasteful number, since it uses less digits than its factorization.

155578940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 707197 (or 707195 counting only the distinct ones).

The product of its (nonzero) digits is 252000, while the sum is 44.

The square root of 155578940 is about 12473.1287173668. The cubic root of 155578940 is about 537.8364967049.

The spelling of 155578940 in words is "one hundred fifty-five million, five hundred seventy-eight thousand, nine hundred forty".