399954750 has 256 divisors, whose sum is σ = 1207664640. Its totient is φ = 87091200.

The previous prime is 399954727. The next prime is 399954773. The reversal of 399954750 is 57459993.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (399954727) and next prime (399954773).

It is a Harshad number since it is a multiple of its sum of digits (51).

It is a junction number, because it is equal to n+sod(n) for n = 399954693 and 399954702.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 3149187 + ... + 3149313.

It is an arithmetic number, because the mean of its divisors is an integer number (4717440).

Almost surely, 2^399954750 is an apocalyptic number.

399954750 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 399954750, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (603832320).

399954750 is an abundant number, since it is smaller than the sum of its proper divisors (807709890).

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

399954750 is a wasteful number, since it uses less digits than its factorization.

399954750 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 196 (or 186 counting only the distinct ones).

The product of its (nonzero) digits is 1530900, while the sum is 51.

The square root of 399954750 is about 19998.8687180050. The cubic root of 399954750 is about 736.7785149428.

The spelling of 399954750 in words is "three hundred ninety-nine million, nine hundred fifty-four thousand, seven hundred fifty".