47542440 has 64 divisors (see below), whose sum is σ = 155597760. Its totient is φ = 11525120.

The previous prime is 47542399. The next prime is 47542457. The reversal of 47542440 is 4424574.

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 = 47542398 and 47542407.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16689 + ... + 19328.

It is an arithmetic number, because the mean of its divisors is an integer number (2431215).

Almost surely, 2^47542440 is an apocalyptic number.

47542440 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

47542440 is an abundant number, since it is smaller than the sum of its proper divisors (108055320).

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

47542440 is a wasteful number, since it uses less digits than its factorization.

47542440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36042 (or 36038 counting only the distinct ones).

The product of its (nonzero) digits is 17920, while the sum is 30.

The square root of 47542440 is about 6895.1026098239. The cubic root of 47542440 is about 362.2656495594.

The spelling of 47542440 in words is "forty-seven million, five hundred forty-two thousand, four hundred forty".