628665492 has 192 divisors, whose sum is σ = 1906688000. Its totient is φ = 160030080.

The previous prime is 628665449. The next prime is 628665497. The reversal of 628665492 is 294566826.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (628665497) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1658559 + ... + 1658937.

Almost surely, 2^628665492 is an apocalyptic number.

628665492 is a gapful number since it is divisible by the number (62) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 628665492, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (953344000).

628665492 is an abundant number, since it is smaller than the sum of its proper divisors (1278022508).

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

628665492 is a wasteful number, since it uses less digits than its factorization.

628665492 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 451 (or 435 counting only the distinct ones).

The product of its digits is 1244160, while the sum is 48.

The square root of 628665492 is about 25073.2026673897. The cubic root of 628665492 is about 856.6561572357.

The spelling of 628665492 in words is "six hundred twenty-eight million, six hundred sixty-five thousand, four hundred ninety-two".