1000390290 has 32 divisors (see below), whose sum is σ = 2505326976. Its totient is φ = 255171840.

The previous prime is 1000390289. The next prime is 1000390291. The reversal of 1000390290 is 920930001.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1000390289) and next prime (1000390291).

It is a self number, because there is not a number n which added to its sum of digits gives 1000390290.

It is not an unprimeable number, because it can be changed into a prime (1000390291) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 724231 + ... + 725610.

It is an arithmetic number, because the mean of its divisors is an integer number (78291468).

Almost surely, 2^1000390290 is an apocalyptic number.

1000390290 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1000390290 is an abundant number, since it is smaller than the sum of its proper divisors (1504936686).

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

1000390290 is a wasteful number, since it uses less digits than its factorization.

1000390290 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1449874.

The product of its (nonzero) digits is 486, while the sum is 24.

The square root of 1000390290 is about 31628.9470264187. The cubic root of 1000390290 is about 1000.1300797452.

The spelling of 1000390290 in words is "one billion, three hundred ninety thousand, two hundred ninety".