47996640 has 72 divisors (see below), whose sum is σ = 163793448. Its totient is φ = 12798720.

The previous prime is 47996633. The next prime is 47996647. The reversal of 47996640 is 4669974.

It is an interprime number because it is at equal distance from previous prime (47996633) and next prime (47996647).

It is a tau number, because it is divible by the number of its divisors (72).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47996647) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 15226 + ... + 18105.

It is an arithmetic number, because the mean of its divisors is an integer number (2274909).

Almost surely, 2^47996640 is an apocalyptic number.

47996640 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

47996640 is an abundant number, since it is smaller than the sum of its proper divisors (115796808).

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

47996640 is a wasteful number, since it uses less digits than its factorization.

47996640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33352 (or 33341 counting only the distinct ones).

The product of its (nonzero) digits is 326592, while the sum is 45.

The square root of 47996640 is about 6927.9607389188. The cubic root of 47996640 is about 363.4156384725.

The spelling of 47996640 in words is "forty-seven million, nine hundred ninety-six thousand, six hundred forty".