997628310 has 96 divisors (see below), whose sum is σ = 2984297472. Its totient is φ = 226497600.

The previous prime is 997628309. The next prime is 997628321. The reversal of 997628310 is 13826799.

997628310 is a `hidden beast` number, since 9 + 9 + 7 + 628 + 3 + 10 = 666.

It is a super-2 number, since 2×997628310² = 1990524489826912200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 89887 + ... + 100373.

It is an arithmetic number, because the mean of its divisors is an integer number (31086432).

Almost surely, 2^997628310 is an apocalyptic number.

997628310 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 997628310, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1492148736).

997628310 is an abundant number, since it is smaller than the sum of its proper divisors (1986669162).

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

997628310 is a wasteful number, since it uses less digits than its factorization.

997628310 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10658 (or 10655 counting only the distinct ones).

The product of its (nonzero) digits is 163296, while the sum is 45.

The square root of 997628310 is about 31585.2546293361. The cubic root of 997628310 is about 999.2088108515.

The spelling of 997628310 in words is "nine hundred ninety-seven million, six hundred twenty-eight thousand, three hundred ten".