49920220 has 96 divisors (see below), whose sum is σ = 129024000. Its totient is φ = 16172352.

The previous prime is 49920203. The next prime is 49920229. The reversal of 49920220 is 2202994.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (49920229) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 130149 + ... + 130531.

It is an arithmetic number, because the mean of its divisors is an integer number (1344000).

Almost surely, 2^49920220 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 49920220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (64512000).

49920220 is an abundant number, since it is smaller than the sum of its proper divisors (79103780).

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

49920220 is a wasteful number, since it uses less digits than its factorization.

49920220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 432 (or 416 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 28.

The square root of 49920220 is about 7065.4242618543. The cubic root of 49920220 is about 368.2071042016.

The spelling of 49920220 in words is "forty-nine million, nine hundred twenty thousand, two hundred twenty".