1640620146 has 32 divisors (see below), whose sum is σ = 3629961216. Its totient is φ = 490154000.

The previous prime is 1640620123. The next prime is 1640620159. The reversal of 1640620146 is 6410260461.

It is a super-2 number, since 2×1640620146² = 5383268926922122632, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 170370 + ... + 179741.

It is an arithmetic number, because the mean of its divisors is an integer number (113436288).

Almost surely, 2^1640620146 is an apocalyptic number.

1640620146 is an abundant number, since it is smaller than the sum of its proper divisors (1989341070).

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

1640620146 is a wasteful number, since it uses less digits than its factorization.

1640620146 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 350198.

The product of its (nonzero) digits is 6912, while the sum is 30.

The square root of 1640620146 is about 40504.5694459279. The cubic root of 1640620146 is about 1179.4223319193.

It can be divided in two parts, 1640620 and 146, that added together give a triangular number (1640766 = T₁₈₁₁).

The spelling of 1640620146 in words is "one billion, six hundred forty million, six hundred twenty thousand, one hundred forty-six".