291474940 has 24 divisors (see below), whose sum is σ = 633205440. Its totient is φ = 112569408.

The previous prime is 291474923. The next prime is 291474943. The reversal of 291474940 is 49474192.

It is a junction number, because it is equal to n+sod(n) for n = 291474893 and 291474902.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (291474943) 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, 250692 + ... + 251851.

It is an arithmetic number, because the mean of its divisors is an integer number (26383560).

Almost surely, 2^291474940 is an apocalyptic number.

291474940 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

291474940 is an abundant number, since it is smaller than the sum of its proper divisors (341730500).

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

291474940 is a wasteful number, since it uses less digits than its factorization.

291474940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 502581 (or 502579 counting only the distinct ones).

The product of its (nonzero) digits is 72576, while the sum is 40.

The square root of 291474940 is about 17072.6371718021. The cubic root of 291474940 is about 663.0308568212.

The spelling of 291474940 in words is "two hundred ninety-one million, four hundred seventy-four thousand, nine hundred forty".