401670878 has 8 divisors (see below), whose sum is σ = 688578672. Its totient is φ = 172144656.

The previous prime is 401670859. The next prime is 401670961. The reversal of 401670878 is 878076104.

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

It is a super-2 number, since 2×401670878² = 322678988466581768, 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, 14345375 + ... + 14345402.

It is an arithmetic number, because the mean of its divisors is an integer number (86072334).

Almost surely, 2^401670878 is an apocalyptic number.

401670878 is a deficient number, since it is larger than the sum of its proper divisors (286907794).

401670878 is a wasteful number, since it uses less digits than its factorization.

401670878 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28690786.

The product of its (nonzero) digits is 75264, while the sum is 41.

The square root of 401670878 is about 20041.7284184773. The cubic root of 401670878 is about 737.8308023974.

The spelling of 401670878 in words is "four hundred one million, six hundred seventy thousand, eight hundred seventy-eight".