157420420 has 24 divisors (see below), whose sum is σ = 338272704. Its totient is φ = 61503456.

The previous prime is 157420411. The next prime is 157420429. The reversal of 157420420 is 24024751.

It is an interprime number because it is at equal distance from previous prime (157420411) and next prime (157420429).

It is not an unprimeable number, because it can be changed into a prime (157420429) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 90664 + ... + 92383.

It is an arithmetic number, because the mean of its divisors is an integer number (14094696).

Almost surely, 2^157420420 is an apocalyptic number.

157420420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

157420420 is an abundant number, since it is smaller than the sum of its proper divisors (180852284).

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

157420420 is a wasteful number, since it uses less digits than its factorization.

157420420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 183099 (or 183097 counting only the distinct ones).

The product of its (nonzero) digits is 2240, while the sum is 25.

The square root of 157420420 is about 12546.7294543239. The cubic root of 157420420 is about 539.9501783024.

The spelling of 157420420 in words is "one hundred fifty-seven million, four hundred twenty thousand, four hundred twenty".