3990288690 has 64 divisors (see below), whose sum is σ = 10984043520. Its totient is φ = 1029749760.

The previous prime is 3990288683. The next prime is 3990288713. The reversal of 3990288690 is 968820993.

It is a super-2 number, since 2×3990288690² = 31844807659083832200, which contains 22 as substring.

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (54).

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, 229999 + ... + 246738.

It is an arithmetic number, because the mean of its divisors is an integer number (171625680).

Almost surely, 2^3990288690 is an apocalyptic number.

3990288690 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

3990288690 is an abundant number, since it is smaller than the sum of its proper divisors (6993754830).

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

3990288690 is a wasteful number, since it uses less digits than its factorization.

3990288690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 476784 (or 476778 counting only the distinct ones).

The product of its (nonzero) digits is 1679616, while the sum is 54.

The square root of 3990288690 is about 63168.7319011550. The cubic root of 3990288690 is about 1586.1153656221.

The spelling of 3990288690 in words is "three billion, nine hundred ninety million, two hundred eighty-eight thousand, six hundred ninety".