47537640 has 48 divisors (see below), whose sum is σ = 154498500. Its totient is φ = 12676608.

The previous prime is 47537629. The next prime is 47537671. The reversal of 47537640 is 4673574.

47537640 is a `hidden beast` number, since 4 + 7 + 5 + 3 + 7 + 640 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 47527236 + 10404 = 6894^2 + 102^2 .

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 47537595 and 47537604.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 65665 + ... + 66384.

Almost surely, 2^47537640 is an apocalyptic number.

47537640 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

47537640 is an abundant number, since it is smaller than the sum of its proper divisors (106960860).

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

47537640 is a wasteful number, since it uses less digits than its factorization.

47537640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 132066 (or 132059 counting only the distinct ones).

The product of its (nonzero) digits is 70560, while the sum is 36.

The square root of 47537640 is about 6894.7545279002. The cubic root of 47537640 is about 362.2534574096.

The spelling of 47537640 in words is "forty-seven million, five hundred thirty-seven thousand, six hundred forty".