396985428 has 288 divisors, whose sum is σ = 1320345600. Its totient is φ = 100818432.

The previous prime is 396985427. The next prime is 396985429. The reversal of 396985428 is 824589693.

396985428 is a `hidden beast` number, since 3 + 9 + 6 + 98 + 542 + 8 = 666.

It is an interprime number because it is at equal distance from previous prime (396985427) and next prime (396985429).

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (396985427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 5025093 + ... + 5025171.

Almost surely, 2^396985428 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 396985428, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (660172800).

396985428 is an abundant number, since it is smaller than the sum of its proper divisors (923360172).

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

396985428 is a wasteful number, since it uses less digits than its factorization.

396985428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 156 (or 131 counting only the distinct ones).

The product of its digits is 3732480, while the sum is 54.

The square root of 396985428 is about 19924.4931679579. The cubic root of 396985428 is about 734.9506672428.

The spelling of 396985428 in words is "three hundred ninety-six million, nine hundred eighty-five thousand, four hundred twenty-eight".