49031990 has 32 divisors (see below), whose sum is σ = 101654784. Its totient is φ = 16679520.

The previous prime is 49031981. The next prime is 49032019. The reversal of 49031990 is 9913094.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 49031990.

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, 6497 + ... + 11843.

It is an arithmetic number, because the mean of its divisors is an integer number (3176712).

Almost surely, 2^49031990 is an apocalyptic number.

49031990 is an abundant number, since it is smaller than the sum of its proper divisors (52622794).

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

49031990 is a wasteful number, since it uses less digits than its factorization.

49031990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5492.

The product of its (nonzero) digits is 8748, while the sum is 35.

The square root of 49031990 is about 7002.2846271770. The cubic root of 49031990 is about 366.0101871412.

The spelling of 49031990 in words is "forty-nine million, thirty-one thousand, nine hundred ninety".