1400363644 has 24 divisors (see below), whose sum is σ = 2610731088. Its totient is φ = 654946560.

The previous prime is 1400363639. The next prime is 1400363659. The reversal of 1400363644 is 4463630041.

It is a happy number.

It is a super-2 number, since 2×1400363644² = 3922036670873917472, 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 in 7 ways as a sum of consecutive naturals, for example, 52087 + ... + 74254.

It is an arithmetic number, because the mean of its divisors is an integer number (108780462).

Almost surely, 2^1400363644 is an apocalyptic number.

It is an amenable number.

1400363644 is a deficient number, since it is larger than the sum of its proper divisors (1210367444).

1400363644 is a wasteful number, since it uses less digits than its factorization.

1400363644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 126525 (or 126523 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 31.

The square root of 1400363644 is about 37421.4329495812. The cubic root of 1400363644 is about 1118.7857919159.

Adding to 1400363644 its reverse (4463630041), we get a palindrome (5863993685).

The spelling of 1400363644 in words is "one billion, four hundred million, three hundred sixty-three thousand, six hundred forty-four".