1864978530 has 16 divisors (see below), whose sum is σ = 4475948544. Its totient is φ = 497327600.

The previous prime is 1864978463. The next prime is 1864978537. The reversal of 1864978530 is 358794681.

It is not an unprimeable number, because it can be changed into a prime (1864978537) 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, 31082946 + ... + 31083005.

It is an arithmetic number, because the mean of its divisors is an integer number (279746784).

Almost surely, 2^1864978530 is an apocalyptic number.

1864978530 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1864978530 is an abundant number, since it is smaller than the sum of its proper divisors (2610970014).

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

1864978530 is a wasteful number, since it uses less digits than its factorization.

1864978530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62165961.

The product of its (nonzero) digits is 1451520, while the sum is 51.

The square root of 1864978530 is about 43185.3971846966. The cubic root of 1864978530 is about 1230.9052163859.

It can be divided in two parts, 18649 and 78530, that added together give a palindrome (97179).

The spelling of 1864978530 in words is "one billion, eight hundred sixty-four million, nine hundred seventy-eight thousand, five hundred thirty".