49971090 has 64 divisors (see below), whose sum is σ = 132685056. Its totient is φ = 11964672.

The previous prime is 49971049. The next prime is 49971091. The reversal of 49971090 is 9017994.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (49971091) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 12699 + ... + 16161.

It is an arithmetic number, because the mean of its divisors is an integer number (2073204).

Almost surely, 2^49971090 is an apocalyptic number.

49971090 is the 5772-nd pentagonal number.

It is a practical number, because each smaller number is the sum of distinct divisors of 49971090, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (66342528).

49971090 is an abundant number, since it is smaller than the sum of its proper divisors (82713966).

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

49971090 is a wasteful number, since it uses less digits than its factorization.

49971090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3523.

The product of its (nonzero) digits is 20412, while the sum is 39.

The square root of 49971090 is about 7069.0232705799. The cubic root of 49971090 is about 368.3321326078.

The spelling of 49971090 in words is "forty-nine million, nine hundred seventy-one thousand, ninety".