1400398 has 4 divisors (see below), whose sum is σ = 2100600. Its totient is φ = 700198.

The previous prime is 1400387. The next prime is 1400411. The reversal of 1400398 is 8930041.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 8930041 = 1811 ⋅4931.

It is a super-2 number, since 2×1400398² = 3922229116808, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 350098 + ... + 350101.

It is an arithmetic number, because the mean of its divisors is an integer number (525150).

2^1400398 is an apocalyptic number.

1400398 is a deficient number, since it is larger than the sum of its proper divisors (700202).

1400398 is an equidigital number, since it uses as much as digits as its factorization.

1400398 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 700201.

The product of its (nonzero) digits is 864, while the sum is 25.

The square root of 1400398 is about 1183.3841303651. The cubic root of 1400398 is about 111.8794941132.

The spelling of 1400398 in words is "one million, four hundred thousand, three hundred ninety-eight".