1400304457 has 4 divisors (see below), whose sum is σ = 1410993936. Its totient is φ = 1389614980.

The previous prime is 1400304449. The next prime is 1400304491. The reversal of 1400304457 is 7544030041.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 7544030041 = 17 ⋅443766473.

It is a cyclic number.

It is not a de Polignac number, because 1400304457 - 2³ = 1400304449 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1400304497) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5344543 + ... + 5344804.

It is an arithmetic number, because the mean of its divisors is an integer number (352748484).

Almost surely, 2^1400304457 is an apocalyptic number.

It is an amenable number.

1400304457 is a deficient number, since it is larger than the sum of its proper divisors (10689479).

1400304457 is a wasteful number, since it uses less digits than its factorization.

1400304457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10689478.

The product of its (nonzero) digits is 6720, while the sum is 28.

The square root of 1400304457 is about 37420.6421243677. The cubic root of 1400304457 is about 1118.7700296987.

Adding to 1400304457 its reverse (7544030041), we get a palindrome (8944334498).

The spelling of 1400304457 in words is "one billion, four hundred million, three hundred four thousand, four hundred fifty-seven".