396978750 has 180 divisors, whose sum is σ = 1245894936. Its totient is φ = 89460000.

The previous prime is 396978737. The next prime is 396978773. The reversal of 396978750 is 57879693.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 89 ways as a sum of consecutive naturals, for example, 5591215 + ... + 5591285.

Almost surely, 2^396978750 is an apocalyptic number.

396978750 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 396978750, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (622947468).

396978750 is an abundant number, since it is smaller than the sum of its proper divisors (848916186).

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

396978750 is an equidigital number, since it uses as much as digits as its factorization.

396978750 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 177 (or 88 counting only the distinct ones).

The product of its (nonzero) digits is 2857680, while the sum is 54.

The square root of 396978750 is about 19924.3255845712. The cubic root of 396978750 is about 734.9465461612.

The spelling of 396978750 in words is "three hundred ninety-six million, nine hundred seventy-eight thousand, seven hundred fifty".