1400391394 has 8 divisors (see below), whose sum is σ = 2100773340. Its totient is φ = 700133616.

The previous prime is 1400391383. The next prime is 1400391401. The reversal of 1400391394 is 4931930041.

It can be written as a sum of positive squares in 2 ways, for example, as 1144807225 + 255584169 = 33835^2 + 15987^2 .

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

It is a super-2 number, since 2×1400391394² = 3922192112778526472, which contains 22 as substring.

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, 5992 + ... + 53260.

Almost surely, 2^1400391394 is an apocalyptic number.

1400391394 is a deficient number, since it is larger than the sum of its proper divisors (700381946).

1400391394 is a wasteful number, since it uses less digits than its factorization.

1400391394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62084.

The product of its (nonzero) digits is 11664, while the sum is 34.

The square root of 1400391394 is about 37421.8037245668. The cubic root of 1400391394 is about 1118.7931819251.

The spelling of 1400391394 in words is "one billion, four hundred million, three hundred ninety-one thousand, three hundred ninety-four".