197426628 has 72 divisors (see below), whose sum is σ = 572394368. Its totient is φ = 56204928.

The previous prime is 197426599. The next prime is 197426657. The reversal of 197426628 is 826624791.

It is a happy number.

197426628 is a `hidden beast` number, since 19 + 7 + 4 + 2 + 6 + 628 = 666.

It is an interprime number because it is at equal distance from previous prime (197426599) and next prime (197426657).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 77625 + ... + 80127.

Almost surely, 2^197426628 is an apocalyptic number.

197426628 is a gapful number since it is divisible by the number (18) 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 197426628, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (286197184).

197426628 is an abundant number, since it is smaller than the sum of its proper divisors (374967740).

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

197426628 is a wasteful number, since it uses less digits than its factorization.

197426628 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2833 (or 2828 counting only the distinct ones).

The product of its digits is 290304, while the sum is 45.

The square root of 197426628 is about 14050.8586214509. The cubic root of 197426628 is about 582.2845174222.

The spelling of 197426628 in words is "one hundred ninety-seven million, four hundred twenty-six thousand, six hundred twenty-eight".