1400198817 has 16 divisors (see below), whose sum is σ = 1879907328. Its totient is φ = 927001680.

The previous prime is 1400198803. The next prime is 1400198843. The reversal of 1400198817 is 7188910041.

It is not a de Polignac number, because 1400198817 - 2¹⁰ = 1400197793 is a prime.

It is a super-4 number, since 4×1400198817⁴ (a number of 38 digits) contains 4444 as substring.

It is not an unprimeable number, because it can be changed into a prime (1400198017) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 261388 + ... + 266690.

It is an arithmetic number, because the mean of its divisors is an integer number (117494208).

Almost surely, 2^1400198817 is an apocalyptic number.

It is an amenable number.

1400198817 is a deficient number, since it is larger than the sum of its proper divisors (479708511).

1400198817 is a wasteful number, since it uses less digits than its factorization.

1400198817 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5900.

The product of its (nonzero) digits is 16128, while the sum is 39.

The square root of 1400198817 is about 37419.2305773382. The cubic root of 1400198817 is about 1118.7418953794.

The spelling of 1400198817 in words is "one billion, four hundred million, one hundred ninety-eight thousand, eight hundred seventeen".