1400154644 has 24 divisors (see below), whose sum is σ = 2813592768. Its totient is φ = 597219840.

The previous prime is 1400154611. The next prime is 1400154661. The reversal of 1400154644 is 4464510041.

It is a super-2 number, since 2×1400154644² = 3920866054229533472, 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, 112589 + ... + 124404.

It is an arithmetic number, because the mean of its divisors is an integer number (117233032).

Almost surely, 2^1400154644 is an apocalyptic number.

1400154644 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

1400154644 is an abundant number, since it is smaller than the sum of its proper divisors (1413438124).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1400154644 is a wasteful number, since it uses less digits than its factorization.

1400154644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 237215 (or 237213 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 29.

The square root of 1400154644 is about 37418.6403280504. The cubic root of 1400154644 is about 1118.7301306917.

Adding to 1400154644 its reverse (4464510041), we get a palindrome (5864664685).

The spelling of 1400154644 in words is "one billion, four hundred million, one hundred fifty-four thousand, six hundred forty-four".