1670645236 has 12 divisors (see below), whose sum is σ = 3148523812. Its totient is φ = 771067008.

The previous prime is 1670645231. The next prime is 1670645237. The reversal of 1670645236 is 6325460761.

It can be written as a sum of positive squares in 2 ways, for example, as 102010000 + 1568635236 = 10100^2 + 39606^2 .

It is a hoax number, since the sum of its digits (40) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1670645231) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16063845 + ... + 16063948.

Almost surely, 2^1670645236 is an apocalyptic number.

It is an amenable number.

1670645236 is a deficient number, since it is larger than the sum of its proper divisors (1477878576).

1670645236 is a wasteful number, since it uses less digits than its factorization.

1670645236 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32127810 (or 32127808 counting only the distinct ones).

The product of its (nonzero) digits is 181440, while the sum is 40.

The square root of 1670645236 is about 40873.5273251526. The cubic root of 1670645236 is about 1186.5737749040.

The spelling of 1670645236 in words is "one billion, six hundred seventy million, six hundred forty-five thousand, two hundred thirty-six".