396861628 has 24 divisors (see below), whose sum is σ = 718344704. Its totient is φ = 191646000.

The previous prime is 396861613. The next prime is 396861637. The reversal of 396861628 is 826168693.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 64903 + ... + 70753.

Almost surely, 2^396861628 is an apocalyptic number.

It is an amenable number.

396861628 is a deficient number, since it is larger than the sum of its proper divisors (321483076).

396861628 is a wasteful number, since it uses less digits than its factorization.

396861628 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6433 (or 6431 counting only the distinct ones).

The product of its digits is 746496, while the sum is 49.

The square root of 396861628 is about 19921.3861967485. The cubic root of 396861628 is about 734.8742611198.

It can be divided in two parts, 39686 and 1628, that added together give a palindrome (41314).

The spelling of 396861628 in words is "three hundred ninety-six million, eight hundred sixty-one thousand, six hundred twenty-eight".