87478401 has 8 divisors (see below), whose sum is σ = 116917920. Its totient is φ = 58178912.

The previous prime is 87478381. The next prime is 87478409. The reversal of 87478401 is 10487478.

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 87478401 - 2⁷ = 87478273 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 87478401.

It is not an unprimeable number, because it can be changed into a prime (87478409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33540 + ... + 36053.

It is an arithmetic number, because the mean of its divisors is an integer number (14614740).

Almost surely, 2^87478401 is an apocalyptic number.

It is an amenable number.

87478401 is a deficient number, since it is larger than the sum of its proper divisors (29439519).

87478401 is a wasteful number, since it uses less digits than its factorization.

87478401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70015.

The product of its (nonzero) digits is 50176, while the sum is 39.

The square root of 87478401 is about 9352.9888805665. The cubic root of 87478401 is about 443.9154686489.

The spelling of 87478401 in words is "eighty-seven million, four hundred seventy-eight thousand, four hundred one".