3640520370 has 16 divisors (see below), whose sum is σ = 8737248960. Its totient is φ = 970805424.

The previous prime is 3640520333. The next prime is 3640520419. The reversal of 3640520370 is 730250463.

It is a Harshad number since it is a multiple of its sum of digits (30), and also a Moran number because the ratio is a prime number: 121350679 = 3640520370 / (3 + 6 + 4 + 0 + 5 + 2 + 0 + 3 + 7 + 0).

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, 60675310 + ... + 60675369.

It is an arithmetic number, because the mean of its divisors is an integer number (546078060).

Almost surely, 2^3640520370 is an apocalyptic number.

3640520370 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

3640520370 is an abundant number, since it is smaller than the sum of its proper divisors (5096728590).

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

3640520370 is a wasteful number, since it uses less digits than its factorization.

3640520370 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 121350689.

The product of its (nonzero) digits is 15120, while the sum is 30.

The square root of 3640520370 is about 60336.7248862581. The cubic root of 3640520370 is about 1538.3476359833.

The spelling of 3640520370 in words is "three billion, six hundred forty million, five hundred twenty thousand, three hundred seventy".