401095978 has 4 divisors (see below), whose sum is σ = 601643970. Its totient is φ = 200547988.

The previous prime is 401095967. The next prime is 401095987. The reversal of 401095978 is 879590104.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 399720049 + 1375929 = 19993^2 + 1173^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100273993 + ... + 100273996.

Almost surely, 2^401095978 is an apocalyptic number.

401095978 is a deficient number, since it is larger than the sum of its proper divisors (200547992).

401095978 is a wasteful number, since it uses less digits than its factorization.

401095978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 200547991.

The product of its (nonzero) digits is 90720, while the sum is 43.

The square root of 401095978 is about 20027.3807074215. The cubic root of 401095978 is about 737.4786223048.

The spelling of 401095978 in words is "four hundred one million, ninety-five thousand, nine hundred seventy-eight".