87440417 has 8 divisors (see below), whose sum is σ = 89286624. Its totient is φ = 85613248.

The previous prime is 87440393. The next prime is 87440461. The reversal of 87440417 is 71404478.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 87440417 - 2⁸ = 87440161 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (87440477) 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, 4718 + ... + 14040.

It is an arithmetic number, because the mean of its divisors is an integer number (11160828).

Almost surely, 2^87440417 is an apocalyptic number.

It is an amenable number.

87440417 is a deficient number, since it is larger than the sum of its proper divisors (1846207).

87440417 is a wasteful number, since it uses less digits than its factorization.

87440417 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9519.

The product of its (nonzero) digits is 25088, while the sum is 35.

The square root of 87440417 is about 9350.9580792558. The cubic root of 87440417 is about 443.8512084961.

The spelling of 87440417 in words is "eighty-seven million, four hundred forty thousand, four hundred seventeen".