157572820 has 12 divisors (see below), whose sum is σ = 330902964. Its totient is φ = 63029120.

The previous prime is 157572797. The next prime is 157572823. The reversal of 157572820 is 28275751.

157572820 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 42354064 + 115218756 = 6508^2 + 10734^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 157572820.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (157572823) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3939301 + ... + 3939340.

It is an arithmetic number, because the mean of its divisors is an integer number (27575247).

Almost surely, 2^157572820 is an apocalyptic number.

157572820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

157572820 is an abundant number, since it is smaller than the sum of its proper divisors (173330144).

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

157572820 is a wasteful number, since it uses less digits than its factorization.

157572820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7878650 (or 7878648 counting only the distinct ones).

The product of its (nonzero) digits is 39200, while the sum is 37.

The square root of 157572820 is about 12552.8012809890. The cubic root of 157572820 is about 540.1243655029.

The spelling of 157572820 in words is "one hundred fifty-seven million, five hundred seventy-two thousand, eight hundred twenty".