157457780 has 24 divisors (see below), whose sum is σ = 331730952. Its totient is φ = 62779392.

The previous prime is 157457771. The next prime is 157457813. The reversal of 157457780 is 87754751.

157457780 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 4 ways, for example, as 5476 + 157452304 = 74^2 + 12548^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6317 + ... + 18836.

It is an arithmetic number, because the mean of its divisors is an integer number (13822123).

Almost surely, 2^157457780 is an apocalyptic number.

157457780 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

157457780 is an abundant number, since it is smaller than the sum of its proper divisors (174273172).

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

157457780 is a wasteful number, since it uses less digits than its factorization.

157457780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25475 (or 25473 counting only the distinct ones).

The product of its (nonzero) digits is 274400, while the sum is 44.

The square root of 157457780 is about 12548.2182002068. The cubic root of 157457780 is about 539.9928897098.

The spelling of 157457780 in words is "one hundred fifty-seven million, four hundred fifty-seven thousand, seven hundred eighty".