1400378 has 16 divisors (see below), whose sum is σ = 2505600. Its totient is φ = 573936.

The previous prime is 1400369. The next prime is 1400383. The reversal of 1400378 is 8730041.

It is a happy number.

It is a super-2 number, since 2×1400378² = 3922117085768, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1853 + ... + 2496.

It is an arithmetic number, because the mean of its divisors is an integer number (156600).

2^1400378 is an apocalyptic number.

1400378 is a deficient number, since it is larger than the sum of its proper divisors (1105222).

1400378 is a wasteful number, since it uses less digits than its factorization.

1400378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4381.

The product of its (nonzero) digits is 672, while the sum is 23.

The square root of 1400378 is about 1183.3756799935. The cubic root of 1400378 is about 111.8789615026.

The spelling of 1400378 in words is "one million, four hundred thousand, three hundred seventy-eight".