1520064464 has 40 divisors (see below), whose sum is σ = 3080997000. Its totient is φ = 725559296.

The previous prime is 1520064439. The next prime is 1520064499. The reversal of 1520064464 is 4644600251.

It can be written as a sum of positive squares in 4 ways, for example, as 44890000 + 1475174464 = 6700^2 + 38408^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1520064464.

It is a congruent number.

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, 22892 + ... + 59700.

It is an arithmetic number, because the mean of its divisors is an integer number (77024925).

Almost surely, 2^1520064464 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1520064464, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1540498500).

1520064464 is an abundant number, since it is smaller than the sum of its proper divisors (1560932536).

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

1520064464 is a wasteful number, since it uses less digits than its factorization.

1520064464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36935 (or 36929 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 32.

The square root of 1520064464 is about 38988.0041038266. The cubic root of 1520064464 is about 1149.7956698092.

The spelling of 1520064464 in words is "one billion, five hundred twenty million, sixty-four thousand, four hundred sixty-four".