783993980 has 48 divisors (see below), whose sum is σ = 2052642816. Its totient is φ = 244361280.

The previous prime is 783993953. The next prime is 783993983. The reversal of 783993980 is 89399387.

It is a super-2 number, since 2×783993980² = 1229293121352480800, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (783993983) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 253004 + ... + 256083.

It is an arithmetic number, because the mean of its divisors is an integer number (42763392).

Almost surely, 2^783993980 is an apocalyptic number.

783993980 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

783993980 is an abundant number, since it is smaller than the sum of its proper divisors (1268648836).

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

783993980 is a wasteful number, since it uses less digits than its factorization.

783993980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 509114 (or 509112 counting only the distinct ones).

The product of its (nonzero) digits is 2939328, while the sum is 56.

The square root of 783993980 is about 27999.8924997936. The cubic root of 783993980 is about 922.0848983014.

The spelling of 783993980 in words is "seven hundred eighty-three million, nine hundred ninety-three thousand, nine hundred eighty".