47405640 has 32 divisors (see below), whose sum is σ = 142217280. Its totient is φ = 12641472.

The previous prime is 47405597. The next prime is 47405653. The reversal of 47405640 is 4650474.

It is a super-3 number, since 3×47405640³ (a number of 24 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 47405598 and 47405607.

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, 197404 + ... + 197643.

It is an arithmetic number, because the mean of its divisors is an integer number (4444290).

Almost surely, 2^47405640 is an apocalyptic number.

47405640 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

47405640 is an abundant number, since it is smaller than the sum of its proper divisors (94811640).

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

47405640 is a wasteful number, since it uses less digits than its factorization.

47405640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 395061 (or 395057 counting only the distinct ones).

The product of its (nonzero) digits is 13440, while the sum is 30.

The square root of 47405640 is about 6885.1753790299. The cubic root of 47405640 is about 361.9178511842.

The spelling of 47405640 in words is "forty-seven million, four hundred five thousand, six hundred forty".