47239890 has 64 divisors (see below), whose sum is σ = 120268800. Its totient is φ = 11841984.

The previous prime is 47239883. The next prime is 47239901. The reversal of 47239890 is 9893274.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 101799 + ... + 102261.

It is an arithmetic number, because the mean of its divisors is an integer number (1879200).

Almost surely, 2^47239890 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 47239890, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (60134400).

47239890 is an abundant number, since it is smaller than the sum of its proper divisors (73028910).

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

47239890 is a wasteful number, since it uses less digits than its factorization.

47239890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 671.

The product of its (nonzero) digits is 108864, while the sum is 42.

The square root of 47239890 is about 6873.1281088017. The cubic root of 47239890 is about 361.4955530904.

The spelling of 47239890 in words is "forty-seven million, two hundred thirty-nine thousand, eight hundred ninety".