157820040 has 96 divisors (see below), whose sum is σ = 586198080. Its totient is φ = 36072576.

The previous prime is 157820021. The next prime is 157820057. The reversal of 157820040 is 40028751.

It is a junction number, because it is equal to n+sod(n) for n = 157819986 and 157820013.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 28794 + ... + 33833.

It is an arithmetic number, because the mean of its divisors is an integer number (6106230).

Almost surely, 2^157820040 is an apocalyptic number.

157820040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

157820040 is an abundant number, since it is smaller than the sum of its proper divisors (428378040).

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

157820040 is a wasteful number, since it uses less digits than its factorization.

157820040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62651 (or 62644 counting only the distinct ones).

The product of its (nonzero) digits is 2240, while the sum is 27.

The square root of 157820040 is about 12562.6446260332. The cubic root of 157820040 is about 540.4066895183.

Adding to 157820040 its reverse (40028751), we get a palindrome (197848791).

The spelling of 157820040 in words is "one hundred fifty-seven million, eight hundred twenty thousand, forty".