400471378 has 4 divisors (see below), whose sum is σ = 600707070. Its totient is φ = 200235688.

The previous prime is 400471373. The next prime is 400471403. The reversal of 400471378 is 873174004.

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., 236452129 + 164019249 = 15377^2 + 12807^2 .

It is not an unprimeable number, because it can be changed into a prime (400471373) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100117843 + ... + 100117846.

Almost surely, 2^400471378 is an apocalyptic number.

400471378 is a deficient number, since it is larger than the sum of its proper divisors (200235692).

400471378 is a wasteful number, since it uses less digits than its factorization.

400471378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 200235691.

The product of its (nonzero) digits is 18816, while the sum is 34.

The square root of 400471378 is about 20011.7809802126. The cubic root of 400471378 is about 737.0956146772.

The spelling of 400471378 in words is "four hundred million, four hundred seventy-one thousand, three hundred seventy-eight".