49491764 has 18 divisors (see below), whose sum is σ = 100751490. Its totient is φ = 21210672.

The previous prime is 49491721. The next prime is 49491769. The reversal of 49491764 is 46719494.

49491764 = T₄₂₇ + T₄₂₈ + ... + T₇₂₀.

It can be written as a sum of positive squares in only one way, i.e., 44782864 + 4708900 = 6692^2 + 2170^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (49491769) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 126059 + ... + 126450.

It is an arithmetic number, because the mean of its divisors is an integer number (5597305).

Almost surely, 2^49491764 is an apocalyptic number.

It is an amenable number.

49491764 is an abundant number, since it is smaller than the sum of its proper divisors (51259726).

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

49491764 is a wasteful number, since it uses less digits than its factorization.

49491764 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 252527 (or 252518 counting only the distinct ones).

The product of its digits is 217728, while the sum is 44.

The square root of 49491764 is about 7035.0383083534. The cubic root of 49491764 is about 367.1506581983.

The spelling of 49491764 in words is "forty-nine million, four hundred ninety-one thousand, seven hundred sixty-four".