97139280 has 160 divisors (see below), whose sum is σ = 349691904. Its totient is φ = 21846528.

The previous prime is 97139257. The next prime is 97139293. The reversal of 97139280 is 8293179.

It is a nialpdrome in base 14.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 112129 + ... + 112991.

Almost surely, 2^97139280 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 97139280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (174845952).

97139280 is an abundant number, since it is smaller than the sum of its proper divisors (252552624).

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

97139280 is a wasteful number, since it uses less digits than its factorization.

97139280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 953 (or 947 counting only the distinct ones).

The product of its (nonzero) digits is 27216, while the sum is 39.

The square root of 97139280 is about 9855.9261360869. The cubic root of 97139280 is about 459.6898981169.

The spelling of 97139280 in words is "ninety-seven million, one hundred thirty-nine thousand, two hundred eighty".