49399720 has 32 divisors (see below), whose sum is σ = 111731400. Its totient is φ = 19656448.

The previous prime is 49399687. The next prime is 49399729. The reversal of 49399720 is 2799394.

It can be written as a sum of positive squares in 4 ways, for example, as 46703556 + 2696164 = 6834^2 + 1642^2 .

It is not an unprimeable number, because it can be changed into a prime (49399729) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4746 + ... + 11014.

Almost surely, 2^49399720 is an apocalyptic number.

49399720 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

49399720 is an abundant number, since it is smaller than the sum of its proper divisors (62331680).

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

49399720 is a wasteful number, since it uses less digits than its factorization.

49399720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6477 (or 6473 counting only the distinct ones).

The product of its (nonzero) digits is 122472, while the sum is 43.

The square root of 49399720 is about 7028.4934374302. The cubic root of 49399720 is about 366.9229099564.

The spelling of 49399720 in words is "forty-nine million, three hundred ninety-nine thousand, seven hundred twenty".