291420140 has 48 divisors (see below), whose sum is σ = 685679904. Its totient is φ = 103104000.

The previous prime is 291420113. The next prime is 291420167. The reversal of 291420140 is 41024192.

It is an interprime number because it is at equal distance from previous prime (291420113) and next prime (291420167).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9761 + ... + 26040.

It is an arithmetic number, because the mean of its divisors is an integer number (14284998).

Almost surely, 2^291420140 is an apocalyptic number.

291420140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

291420140 is an abundant number, since it is smaller than the sum of its proper divisors (394259764).

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

291420140 is a wasteful number, since it uses less digits than its factorization.

291420140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35858 (or 35856 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 23.

The square root of 291420140 is about 17071.0321890623. The cubic root of 291420140 is about 662.9893022274.

The spelling of 291420140 in words is "two hundred ninety-one million, four hundred twenty thousand, one hundred forty".