1646140790 has 24 divisors (see below), whose sum is σ = 3446818272. Its totient is φ = 564390960.

The previous prime is 1646140789. The next prime is 1646140813. The reversal of 1646140790 is 970416461.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1679246 + ... + 1680225.

It is an arithmetic number, because the mean of its divisors is an integer number (143617428).

Almost surely, 2^1646140790 is an apocalyptic number.

1646140790 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1646140790 is an abundant number, since it is smaller than the sum of its proper divisors (1800677482).

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

1646140790 is a wasteful number, since it uses less digits than its factorization.

1646140790 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3359492 (or 3359485 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 38.

The square root of 1646140790 is about 40572.6606226410. The cubic root of 1646140790 is about 1180.7437592978.

The spelling of 1646140790 in words is "one billion, six hundred forty-six million, one hundred forty thousand, seven hundred ninety".