247401894 has 8 divisors (see below), whose sum is σ = 494803800. Its totient is φ = 82467296.

The previous prime is 247401887. The next prime is 247401923. The reversal of 247401894 is 498104742.

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

247401894 is an admirable number.

It is a super-2 number, since 2×247401894² = 122415394309574472, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20616819 + ... + 20616830.

It is an arithmetic number, because the mean of its divisors is an integer number (61850475).

Almost surely, 2^247401894 is an apocalyptic number.

247401894 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

247401894 is a wasteful number, since it uses less digits than its factorization.

247401894 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41233654.

The product of its (nonzero) digits is 64512, while the sum is 39.

The square root of 247401894 is about 15729.0144001460. The cubic root of 247401894 is about 627.7706490038.

The spelling of 247401894 in words is "two hundred forty-seven million, four hundred one thousand, eight hundred ninety-four".