155780030 has 16 divisors (see below), whose sum is σ = 320461920. Its totient is φ = 53410272.

The previous prime is 155780017. The next prime is 155780039. The reversal of 155780030 is 30087551.

It is a junction number, because it is equal to n+sod(n) for n = 155779975 and 155780002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155780039) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1112645 + ... + 1112784.

It is an arithmetic number, because the mean of its divisors is an integer number (20028870).

Almost surely, 2^155780030 is an apocalyptic number.

155780030 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

155780030 is an abundant number, since it is smaller than the sum of its proper divisors (164681890).

155780030 is a wasteful number, since it uses less digits than its factorization.

155780030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2225443.

The product of its (nonzero) digits is 4200, while the sum is 29.

The square root of 155780030 is about 12481.1870429058. The cubic root of 155780030 is about 538.0681196941.

The spelling of 155780030 in words is "one hundred fifty-five million, seven hundred eighty thousand, thirty".