157783740 has 24 divisors (see below), whose sum is σ = 441794640. Its totient is φ = 42075648.

The previous prime is 157783729. The next prime is 157783757. The reversal of 157783740 is 47387751.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 157783692 and 157783701.

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, 1314805 + ... + 1314924.

It is an arithmetic number, because the mean of its divisors is an integer number (18408110).

Almost surely, 2^157783740 is an apocalyptic number.

157783740 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

157783740 is an abundant number, since it is smaller than the sum of its proper divisors (284010900).

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

157783740 is a wasteful number, since it uses less digits than its factorization.

157783740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2629741 (or 2629739 counting only the distinct ones).

The product of its (nonzero) digits is 164640, while the sum is 42.

The square root of 157783740 is about 12561.1997834602. The cubic root of 157783740 is about 540.3652535743.

The spelling of 157783740 in words is "one hundred fifty-seven million, seven hundred eighty-three thousand, seven hundred forty".