997126428 has 24 divisors (see below), whose sum is σ = 2361356032. Its totient is φ = 327414384.

The previous prime is 997126409. The next prime is 997126433. The reversal of 997126428 is 824621799.

It is a super-2 number, since 2×997126428² = 1988522226832078368, which contains 22 as substring.

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, 619300 + ... + 620907.

Almost surely, 2^997126428 is an apocalyptic number.

It is an amenable number.

997126428 is an abundant number, since it is smaller than the sum of its proper divisors (1364229604).

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

997126428 is a wasteful number, since it uses less digits than its factorization.

997126428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1240281 (or 1240279 counting only the distinct ones).

The product of its digits is 435456, while the sum is 48.

The square root of 997126428 is about 31577.3087516970. The cubic root of 997126428 is about 999.0412237085.

The spelling of 997126428 in words is "nine hundred ninety-seven million, one hundred twenty-six thousand, four hundred twenty-eight".