47509490 has 48 divisors (see below), whose sum is σ = 102247488. Its totient is φ = 15568608.

The previous prime is 47509489. The next prime is 47509493. The reversal of 47509490 is 9490574.

It is a Smith number, since the sum of its digits (38) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (47509493) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 36389 + ... + 37671.

It is an arithmetic number, because the mean of its divisors is an integer number (2130156).

Almost surely, 2^47509490 is an apocalyptic number.

47509490 is an abundant number, since it is smaller than the sum of its proper divisors (54737998).

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

47509490 is a wasteful number, since it uses less digits than its factorization.

47509490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1343 (or 1320 counting only the distinct ones).

The product of its (nonzero) digits is 45360, while the sum is 38.

The square root of 47509490 is about 6892.7128186223. The cubic root of 47509490 is about 362.1819390063.

The spelling of 47509490 in words is "forty-seven million, five hundred nine thousand, four hundred ninety".