1545427720 has 16 divisors (see below), whose sum is σ = 3477212460. Its totient is φ = 618171072.

The previous prime is 1545427703. The next prime is 1545427733. The reversal of 1545427720 is 277245451.

It can be written as a sum of positive squares in 2 ways, for example, as 1499703076 + 45724644 = 38726^2 + 6762^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1545427720.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19317807 + ... + 19317886.

Almost surely, 2^1545427720 is an apocalyptic number.

1545427720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1545427720 is an abundant number, since it is smaller than the sum of its proper divisors (1931784740).

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

1545427720 is a wasteful number, since it uses less digits than its factorization.

1545427720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38635704 (or 38635700 counting only the distinct ones).

The product of its (nonzero) digits is 78400, while the sum is 37.

The square root of 1545427720 is about 39311.9284696134. The cubic root of 1545427720 is about 1156.1554549624.

The spelling of 1545427720 in words is "one billion, five hundred forty-five million, four hundred twenty-seven thousand, seven hundred twenty".