477657640 has 32 divisors (see below), whose sum is σ = 1075399560. Its totient is φ = 190944000.

The previous prime is 477657623. The next prime is 477657643. The reversal of 477657640 is 46756774.

It can be written as a sum of positive squares in 4 ways, for example, as 246678436 + 230979204 = 15706^2 + 15198^2 .

It is not an unprimeable number, because it can be changed into a prime (477657643) 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, 91090 + ... + 96190.

Almost surely, 2^477657640 is an apocalyptic number.

477657640 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

477657640 is an abundant number, since it is smaller than the sum of its proper divisors (597741920).

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

477657640 is a wasteful number, since it uses less digits than its factorization.

477657640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7453 (or 7449 counting only the distinct ones).

The product of its (nonzero) digits is 987840, while the sum is 46.

The square root of 477657640 is about 21855.3801156603. The cubic root of 477657640 is about 781.6978356969.

The spelling of 477657640 in words is "four hundred seventy-seven million, six hundred fifty-seven thousand, six hundred forty".