631401478 has 8 divisors (see below), whose sum is σ = 967253472. Its totient is φ = 308983656.

The previous prime is 631401473. The next prime is 631401487. The reversal of 631401478 is 874104136.

It is a happy number.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (631401473) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3358425 + ... + 3358612.

It is an arithmetic number, because the mean of its divisors is an integer number (120906684).

Almost surely, 2^631401478 is an apocalyptic number.

631401478 is a deficient number, since it is larger than the sum of its proper divisors (335851994).

631401478 is a wasteful number, since it uses less digits than its factorization.

631401478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6717086.

The product of its (nonzero) digits is 16128, while the sum is 34.

The square root of 631401478 is about 25127.7033968487. The cubic root of 631401478 is about 857.8970966364.

The spelling of 631401478 in words is "six hundred thirty-one million, four hundred one thousand, four hundred seventy-eight".