1378693530 has 48 divisors (see below), whose sum is σ = 3597894144. Its totient is φ = 366288480.

The previous prime is 1378693517. The next prime is 1378693567. The reversal of 1378693530 is 353968731.

1378693530 is a `hidden beast` number, since 1 + 37 + 86 + 9 + 3 + 530 = 666.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

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, 3874 + ... + 52653.

It is an arithmetic number, because the mean of its divisors is an integer number (74956128).

Almost surely, 2^1378693530 is an apocalyptic number.

1378693530 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1378693530 is an abundant number, since it is smaller than the sum of its proper divisors (2219200614).

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

1378693530 is a wasteful number, since it uses less digits than its factorization.

1378693530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56811 (or 56808 counting only the distinct ones).

The product of its (nonzero) digits is 408240, while the sum is 45.

The square root of 1378693530 is about 37130.7625830658. The cubic root of 1378693530 is about 1112.9848323166.

The spelling of 1378693530 in words is "one billion, three hundred seventy-eight million, six hundred ninety-three thousand, five hundred thirty".