1290433690 has 32 divisors (see below), whose sum is σ = 2858808960. Its totient is φ = 408400704.

The previous prime is 1290433687. The next prime is 1290433691. The reversal of 1290433690 is 963340921.

It is a super-2 number, since 2×1290433690² = 3330438216574032200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1290433691) 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, 708120 + ... + 709939.

It is an arithmetic number, because the mean of its divisors is an integer number (89337780).

Almost surely, 2^1290433690 is an apocalyptic number.

1290433690 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1290433690 is an abundant number, since it is smaller than the sum of its proper divisors (1568375270).

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

1290433690 is a wasteful number, since it uses less digits than its factorization.

1290433690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1418086.

The product of its (nonzero) digits is 34992, while the sum is 37.

The square root of 1290433690 is about 35922.6069488282. The cubic root of 1290433690 is about 1088.7092118768.

The spelling of 1290433690 in words is "one billion, two hundred ninety million, four hundred thirty-three thousand, six hundred ninety".