49987665 has 96 divisors (see below), whose sum is σ = 110327040. Its totient is φ = 21026304.

The previous prime is 49987661. The next prime is 49987673. The reversal of 49987665 is 56678994.

It is not a de Polignac number, because 49987665 - 2² = 49987661 is a prime.

It is a super-4 number, since 4×49987665⁴ (a number of 32 digits) contains 4444 as substring.

Its product of digits (3265920) is a multiple of the sum of its prime factors (360).

It is not an unprimeable number, because it can be changed into a prime (49987661) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 159549 + ... + 159861.

It is an arithmetic number, because the mean of its divisors is an integer number (1149240).

Almost surely, 2^49987665 is an apocalyptic number.

49987665 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

49987665 is an abundant number, since it is smaller than the sum of its proper divisors (60339375).

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

49987665 is a wasteful number, since it uses less digits than its factorization.

49987665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 360 (or 341 counting only the distinct ones).

The product of its digits is 3265920, while the sum is 54.

The square root of 49987665 is about 7070.1955418503. The cubic root of 49987665 is about 368.3728523534.

The spelling of 49987665 in words is "forty-nine million, nine hundred eighty-seven thousand, six hundred sixty-five".