157820403 has 32 divisors (see below), whose sum is σ = 239599360. Its totient is φ = 91601280.

The previous prime is 157820389. The next prime is 157820413. The reversal of 157820403 is 304028751.

157820403 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 157820403 - 2⁸ = 157820147 is a prime.

It is not an unprimeable number, because it can be changed into a prime (157820413) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 276108 + ... + 276678.

It is an arithmetic number, because the mean of its divisors is an integer number (7487480).

Almost surely, 2^157820403 is an apocalyptic number.

157820403 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

157820403 is a deficient number, since it is larger than the sum of its proper divisors (81778957).

157820403 is a wasteful number, since it uses less digits than its factorization.

157820403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 979.

The product of its (nonzero) digits is 6720, while the sum is 30.

The square root of 157820403 is about 12562.6590736197. The cubic root of 157820403 is about 540.4071038457.

The spelling of 157820403 in words is "one hundred fifty-seven million, eight hundred twenty thousand, four hundred three".