997943436 has 48 divisors (see below), whose sum is σ = 2956871680. Its totient is φ = 285126480.

The previous prime is 997943431. The next prime is 997943461. The reversal of 997943436 is 634349799.

It is a super-2 number, since 2×997943436² = 1991782202910972192, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (997943431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 659260 + ... + 660771.

Almost surely, 2^997943436 is an apocalyptic number.

It is an amenable number.

997943436 is an abundant number, since it is smaller than the sum of its proper divisors (1958928244).

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

997943436 is a wasteful number, since it uses less digits than its factorization.

997943436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1320051 (or 1320043 counting only the distinct ones).

The product of its digits is 4408992, while the sum is 54.

The square root of 997943436 is about 31590.2427341102. The cubic root of 997943436 is about 999.3140081895.

The spelling of 997943436 in words is "nine hundred ninety-seven million, nine hundred forty-three thousand, four hundred thirty-six".