97228140 has 24 divisors (see below), whose sum is σ = 272238960. Its totient is φ = 25927488.

The previous prime is 97228123. The next prime is 97228141. The reversal of 97228140 is 4182279.

It is a happy number.

It is a super-2 number, since 2×97228140² = 18906622415719200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (97228141) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 810175 + ... + 810294.

It is an arithmetic number, because the mean of its divisors is an integer number (11343290).

Almost surely, 2^97228140 is an apocalyptic number.

It is an amenable number.

97228140 is an abundant number, since it is smaller than the sum of its proper divisors (175010820).

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

97228140 is a wasteful number, since it uses less digits than its factorization.

97228140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1620481 (or 1620479 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 33.

The square root of 97228140 is about 9860.4330533704. The cubic root of 97228140 is about 459.8300254172.

The spelling of 97228140 in words is "ninety-seven million, two hundred twenty-eight thousand, one hundred forty".