909938481 has 32 divisors (see below), whose sum is σ = 1398902400. Its totient is φ = 522224640.

The previous prime is 909938479. The next prime is 909938501. The reversal of 909938481 is 184839909.

It is a happy number.

It is not a de Polignac number, because 909938481 - 2¹ = 909938479 is a prime.

It is a super-2 number, since 2×909938481² = 1655976078409174722, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is not an unprimeable number, because it can be changed into a prime (909938401) 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, 11911 + ... + 44291.

It is an arithmetic number, because the mean of its divisors is an integer number (43715700).

Almost surely, 2^909938481 is an apocalyptic number.

It is an amenable number.

909938481 is a deficient number, since it is larger than the sum of its proper divisors (488963919).

909938481 is a wasteful number, since it uses less digits than its factorization.

909938481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32449.

The product of its (nonzero) digits is 559872, while the sum is 51.

The square root of 909938481 is about 30165.1865732669. The cubic root of 909938481 is about 969.0302708122.

The spelling of 909938481 in words is "nine hundred nine million, nine hundred thirty-eight thousand, four hundred eighty-one".