1690220080 has 40 divisors (see below), whose sum is σ = 4025617344. Its totient is φ = 659596800.

The previous prime is 1690220041. The next prime is 1690220111. The reversal of 1690220080 is 800220961.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (40).

It is a hoax number, since the sum of its digits (28) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 254376 + ... + 260935.

Almost surely, 2^1690220080 is an apocalyptic number.

1690220080 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1690220080 is an abundant number, since it is smaller than the sum of its proper divisors (2335397264).

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

1690220080 is a wasteful number, since it uses less digits than its factorization.

1690220080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 515365 (or 515359 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 28.

The square root of 1690220080 is about 41112.2862414631. The cubic root of 1690220080 is about 1191.1901282272.

The spelling of 1690220080 in words is "one billion, six hundred ninety million, two hundred twenty thousand, eighty".