49987440 has 60 divisors (see below), whose sum is σ = 167876904. Its totient is φ = 13329792.

The previous prime is 49987439. The next prime is 49987453. The reversal of 49987440 is 4478994.

It is a tau number, because it is divible by the number of its divisors (60).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 33994 + ... + 35433.

Almost surely, 2^49987440 is an apocalyptic number.

49987440 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

49987440 is an abundant number, since it is smaller than the sum of its proper divisors (117889464).

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

49987440 is a wasteful number, since it uses less digits than its factorization.

49987440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69446 (or 69437 counting only the distinct ones).

The product of its (nonzero) digits is 290304, while the sum is 45.

The square root of 49987440 is about 7070.1796299670. The cubic root of 49987440 is about 368.3722996570.

The spelling of 49987440 in words is "forty-nine million, nine hundred eighty-seven thousand, four hundred forty".