47031990 has 32 divisors (see below), whose sum is σ = 114566400. Its totient is φ = 12354144.

The previous prime is 47031983. The next prime is 47032039. The reversal of 47031990 is 9913074.

It is a congruent number.

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, 9690 + ... + 13709.

It is an arithmetic number, because the mean of its divisors is an integer number (3580200).

Almost surely, 2^47031990 is an apocalyptic number.

47031990 is an abundant number, since it is smaller than the sum of its proper divisors (67534410).

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

47031990 is a wasteful number, since it uses less digits than its factorization.

47031990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23476.

The product of its (nonzero) digits is 6804, while the sum is 33.

The square root of 47031990 is about 6857.9873140740. The cubic root of 47031990 is about 360.9644662861.

The spelling of 47031990 in words is "forty-seven million, thirty-one thousand, nine hundred ninety".