1000993780 has 48 divisors (see below), whose sum is σ = 2155507200. Its totient is φ = 390291968.

The previous prime is 1000993727. The next prime is 1000993793. The reversal of 1000993780 is 873990001.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 245196 + ... + 249244.

It is an arithmetic number, because the mean of its divisors is an integer number (44906400).

Almost surely, 2^1000993780 is an apocalyptic number.

1000993780 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1000993780 is an abundant number, since it is smaller than the sum of its proper divisors (1154513420).

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

1000993780 is a wasteful number, since it uses less digits than its factorization.

1000993780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4368 (or 4366 counting only the distinct ones).

The product of its (nonzero) digits is 13608, while the sum is 37.

The square root of 1000993780 is about 31638.4857412614. The cubic root of 1000993780 is about 1000.3311503274.

The spelling of 1000993780 in words is "one billion, nine hundred ninety-three thousand, seven hundred eighty".