49031890 has 32 divisors (see below), whose sum is σ = 91259136. Its totient is φ = 18957120.

The previous prime is 49031881. The next prime is 49031909. The reversal of 49031890 is 9813094.

49031890 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 36979 + ... + 38281.

It is an arithmetic number, because the mean of its divisors is an integer number (2851848).

Almost surely, 2^49031890 is an apocalyptic number.

49031890 is a deficient number, since it is larger than the sum of its proper divisors (42227246).

49031890 is a wasteful number, since it uses less digits than its factorization.

49031890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1434.

The product of its (nonzero) digits is 7776, while the sum is 34.

The square root of 49031890 is about 7002.2774866468. The cubic root of 49031890 is about 366.0099383169.

Subtracting from 49031890 its reverse (9813094), we obtain a triangular number (39218796 = T₈₈₅₆).

The spelling of 49031890 in words is "forty-nine million, thirty-one thousand, eight hundred ninety".