87249478 has 8 divisors (see below), whose sum is σ = 134411472. Its totient is φ = 42445656.

The previous prime is 87249467. The next prime is 87249497. The reversal of 87249478 is 87494278.

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

It is a super-2 number, since 2×87249478² = 15224942822544968, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 589450 + ... + 589597.

It is an arithmetic number, because the mean of its divisors is an integer number (16801434).

Almost surely, 2^87249478 is an apocalyptic number.

87249478 is a deficient number, since it is larger than the sum of its proper divisors (47161994).

87249478 is a wasteful number, since it uses less digits than its factorization.

87249478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1179086.

The product of its digits is 903168, while the sum is 49.

The square root of 87249478 is about 9340.7429040735. The cubic root of 87249478 is about 443.5279016063.

The spelling of 87249478 in words is "eighty-seven million, two hundred forty-nine thousand, four hundred seventy-eight".