47209890 has 64 divisors (see below), whose sum is σ = 139458816. Its totient is φ = 9960192.

The previous prime is 47209879. The next prime is 47209919. The reversal of 47209890 is 9890274.

It is a Harshad number since it is a multiple of its sum of digits (39).

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, 5917 + ... + 11376.

It is an arithmetic number, because the mean of its divisors is an integer number (2179044).

Almost surely, 2^47209890 is an apocalyptic number.

47209890 is an abundant number, since it is smaller than the sum of its proper divisors (92248926).

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

47209890 is a wasteful number, since it uses less digits than its factorization.

47209890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17323.

The product of its (nonzero) digits is 36288, while the sum is 39.

The square root of 47209890 is about 6870.9453498045. The cubic root of 47209890 is about 361.4190135169.

The spelling of 47209890 in words is "forty-seven million, two hundred nine thousand, eight hundred ninety".