97219440 has 140 divisors (see below), whose sum is σ = 339101064. Its totient is φ = 25909632.

The previous prime is 97219439. The next prime is 97219457. The reversal of 97219440 is 4491279.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 97219395 and 97219404.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 57487 + ... + 59153.

Almost surely, 2^97219440 is an apocalyptic number.

97219440 is a gapful number since it is divisible by the number (90) 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 97219440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (169550532).

97219440 is an abundant number, since it is smaller than the sum of its proper divisors (241881624).

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

97219440 is a wasteful number, since it uses less digits than its factorization.

97219440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1698 (or 1677 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 36.

The square root of 97219440 is about 9859.9918864064. The cubic root of 97219440 is about 459.8163097702.

The spelling of 97219440 in words is "ninety-seven million, two hundred nineteen thousand, four hundred forty".