81460290 has 32 divisors (see below), whose sum is σ = 195987456. Its totient is φ = 21669120.

The previous prime is 81460289. The next prime is 81460321. The reversal of 81460290 is 9206418.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a Curzon number.

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, 9855 + ... + 16125.

It is an arithmetic number, because the mean of its divisors is an integer number (6124608).

Almost surely, 2^81460290 is an apocalyptic number.

81460290 is an abundant number, since it is smaller than the sum of its proper divisors (114527166).

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

81460290 is a wasteful number, since it uses less digits than its factorization.

81460290 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6714.

The product of its (nonzero) digits is 3456, while the sum is 30.

The square root of 81460290 is about 9025.5354411802. The cubic root of 81460290 is about 433.4928952166.

The spelling of 81460290 in words is "eighty-one million, four hundred sixty thousand, two hundred ninety".