1864040290 has 64 divisors (see below), whose sum is σ = 4026433536. Its totient is φ = 607476672.

The previous prime is 1864040281. The next prime is 1864040303. The reversal of 1864040290 is 920404681.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 258879 + ... + 265981.

It is an arithmetic number, because the mean of its divisors is an integer number (62913024).

Almost surely, 2^1864040290 is an apocalyptic number.

1864040290 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1864040290 is an abundant number, since it is smaller than the sum of its proper divisors (2162393246).

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

1864040290 is a wasteful number, since it uses less digits than its factorization.

1864040290 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7303.

The product of its (nonzero) digits is 13824, while the sum is 34.

The square root of 1864040290 is about 43174.5328868767. The cubic root of 1864040290 is about 1230.6987657103.

The spelling of 1864040290 in words is "one billion, eight hundred sixty-four million, forty thousand, two hundred ninety".