156798820 has 48 divisors (see below), whose sum is σ = 363823488. Its totient is φ = 56460800.

The previous prime is 156798793. The next prime is 156798821. The reversal of 156798820 is 28897651.

It is a Harshad number since it is a multiple of its sum of digits (46).

It is not an unprimeable number, because it can be changed into a prime (156798821) 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 15 ways as a sum of consecutive naturals, for example, 2206 + ... + 17845.

It is an arithmetic number, because the mean of its divisors is an integer number (7579656).

Almost surely, 2^156798820 is an apocalyptic number.

156798820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

156798820 is an abundant number, since it is smaller than the sum of its proper divisors (207024668).

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

156798820 is a wasteful number, since it uses less digits than its factorization.

156798820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20100 (or 20098 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 46.

The square root of 156798820 is about 12521.9335567635. The cubic root of 156798820 is about 539.2385472667.

The spelling of 156798820 in words is "one hundred fifty-six million, seven hundred ninety-eight thousand, eight hundred twenty".