905461840 has 20 divisors (see below), whose sum is σ = 2105198964. Its totient is φ = 362184704.

The previous prime is 905461819. The next prime is 905461873. The reversal of 905461840 is 48164509.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 658846224 + 246615616 = 25668^2 + 15704^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a super-2 number, since 2×905461840² = 1639722287392371200, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 905461840.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5659057 + ... + 5659216.

Almost surely, 2^905461840 is an apocalyptic number.

It is an amenable number.

905461840 is an abundant number, since it is smaller than the sum of its proper divisors (1199737124).

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

905461840 is a wasteful number, since it uses less digits than its factorization.

905461840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11318286 (or 11318280 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 37.

The square root of 905461840 is about 30090.8929744533. The cubic root of 905461840 is about 967.4385390074.

The spelling of 905461840 in words is "nine hundred five million, four hundred sixty-one thousand, eight hundred forty".