1400155408 has 20 divisors (see below), whose sum is σ = 2717688780. Its totient is φ = 698816384.

The previous prime is 1400155399. The next prime is 1400155423. The reversal of 1400155408 is 8045510041.

It can be written as a sum of positive squares in 2 ways, for example, as 94633984 + 1305521424 = 9728^2 + 36132^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 69643 + ... + 87466.

It is an arithmetic number, because the mean of its divisors is an integer number (135884439).

Almost surely, 2^1400155408 is an apocalyptic number.

It is an amenable number.

1400155408 is a deficient number, since it is larger than the sum of its proper divisors (1317533372).

1400155408 is a wasteful number, since it uses less digits than its factorization.

1400155408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157674 (or 157668 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 28.

The square root of 1400155408 is about 37418.6505368646. The cubic root of 1400155408 is about 1118.7303341715.

Adding to 1400155408 its reverse (8045510041), we get a palindrome (9445665449).

The spelling of 1400155408 in words is "one billion, four hundred million, one hundred fifty-five thousand, four hundred eight".