1987624330 has 16 divisors (see below), whose sum is σ = 3701094120. Its totient is φ = 767634112.

The previous prime is 1987624321. The next prime is 1987624337. The reversal of 1987624330 is 334267891.

It can be written as a sum of positive squares in 4 ways, for example, as 1776706801 + 210917529 = 42151^2 + 14523^2 .

It is not an unprimeable number, because it can be changed into a prime (1987624337) 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, 3426649 + ... + 3427228.

Almost surely, 2^1987624330 is an apocalyptic number.

1987624330 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1987624330 is a deficient number, since it is larger than the sum of its proper divisors (1713469790).

1987624330 is a wasteful number, since it uses less digits than its factorization.

1987624330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6853913.

The product of its (nonzero) digits is 217728, while the sum is 43.

The square root of 1987624330 is about 44582.7806445493. The cubic root of 1987624330 is about 1257.3169433690.

The spelling of 1987624330 in words is "one billion, nine hundred eighty-seven million, six hundred twenty-four thousand, three hundred thirty".