640120362 has 16 divisors (see below), whose sum is σ = 1463132352. Its totient is φ = 182891520.

The previous prime is 640120361. The next prime is 640120367. The reversal of 640120362 is 263021046.

640120362 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×640120362² = 819508155694022088, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (640120361) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7620439 + ... + 7620522.

It is an arithmetic number, because the mean of its divisors is an integer number (91445772).

Almost surely, 2^640120362 is an apocalyptic number.

640120362 is an abundant number, since it is smaller than the sum of its proper divisors (823011990).

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

640120362 is a wasteful number, since it uses less digits than its factorization.

640120362 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15240973.

The product of its (nonzero) digits is 1728, while the sum is 24.

The square root of 640120362 is about 25300.6000324103. The cubic root of 640120362 is about 861.8278959740.

Adding to 640120362 its product of nonzero digits (1728), we get a triangular number (640122090 = T₃₅₇₈₀).

The spelling of 640120362 in words is "six hundred forty million, one hundred twenty thousand, three hundred sixty-two".