97487640 has 48 divisors (see below), whose sum is σ = 316836000. Its totient is φ = 25996608.

The previous prime is 97487629. The next prime is 97487641. The reversal of 97487640 is 4678479.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (97487641) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 135040 + ... + 135759.

It is an arithmetic number, because the mean of its divisors is an integer number (6600750).

Almost surely, 2^97487640 is an apocalyptic number.

97487640 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

It is an amenable number.

97487640 is an abundant number, since it is smaller than the sum of its proper divisors (219348360).

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

97487640 is a wasteful number, since it uses less digits than its factorization.

97487640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 270816 (or 270809 counting only the distinct ones).

The product of its (nonzero) digits is 338688, while the sum is 45.

The square root of 97487640 is about 9873.5829363003. The cubic root of 97487640 is about 460.2387544444.

The spelling of 97487640 in words is "ninety-seven million, four hundred eighty-seven thousand, six hundred forty".