49661720 has 32 divisors (see below), whose sum is σ = 112000320. Its totient is φ = 19818240.

The previous prime is 49661683. The next prime is 49661723. The reversal of 49661720 is 2716694.

It is a Smith number, since the sum of its digits (35) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (49661723) 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, 19649 + ... + 22031.

It is an arithmetic number, because the mean of its divisors is an integer number (3500010).

Almost surely, 2^49661720 is an apocalyptic number.

49661720 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

49661720 is an abundant number, since it is smaller than the sum of its proper divisors (62338600).

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

49661720 is a wasteful number, since it uses less digits than its factorization.

49661720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2915 (or 2911 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 35.

The square root of 49661720 is about 7047.1072079258. The cubic root of 49661720 is about 367.5704463345.

The spelling of 49661720 in words is "forty-nine million, six hundred sixty-one thousand, seven hundred twenty".