1538538930 has 48 divisors (see below), whose sum is σ = 4235511384. Its totient is φ = 386142720.

The previous prime is 1538538923. The next prime is 1538538979. The reversal of 1538538930 is 398358351.

1538538930 is a `hidden beast` number, since 1 + 538 + 5 + 3 + 89 + 30 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 1407825441 + 130713489 = 37521^2 + 11433^2 .

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 501261 + ... + 504320.

Almost surely, 2^1538538930 is an apocalyptic number.

1538538930 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1538538930 is an abundant number, since it is smaller than the sum of its proper divisors (2696972454).

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

1538538930 is a wasteful number, since it uses less digits than its factorization.

1538538930 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1005611 (or 1005608 counting only the distinct ones).

The product of its (nonzero) digits is 388800, while the sum is 45.

The square root of 1538538930 is about 39224.2135676421. The cubic root of 1538538930 is about 1154.4350303742.

The spelling of 1538538930 in words is "one billion, five hundred thirty-eight million, five hundred thirty-eight thousand, nine hundred thirty".