684011952 has 210 divisors, whose sum is σ = 2157804972. Its totient is φ = 209858688.

The previous prime is 684011929. The next prime is 684011963. The reversal of 684011952 is 259110486.

684011952 is a `hidden beast` number, since 68 + 401 + 195 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 41 ways as a sum of consecutive naturals, for example, 1971043 + ... + 1971389.

Almost surely, 2^684011952 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 684011952, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1078902486).

684011952 is an abundant number, since it is smaller than the sum of its proper divisors (1473793020).

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

684011952 is a wasteful number, since it uses less digits than its factorization.

684011952 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 399 (or 365 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 36.

The square root of 684011952 is about 26153.6221583168. The cubic root of 684011952 is about 881.0919434054.

The spelling of 684011952 in words is "six hundred eighty-four million, eleven thousand, nine hundred fifty-two".