1400424720 has 40 divisors (see below), whose sum is σ = 4341317376. Its totient is φ = 373446528.

The previous prime is 1400424709. The next prime is 1400424743. The reversal of 1400424720 is 274240041.

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-3 number, since 3×1400424720³ (a number of 28 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2917312 + ... + 2917791.

Almost surely, 2^1400424720 is an apocalyptic number.

1400424720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1400424720 is an abundant number, since it is smaller than the sum of its proper divisors (2940892656).

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

1400424720 is a wasteful number, since it uses less digits than its factorization.

1400424720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5835119 (or 5835113 counting only the distinct ones).

The product of its (nonzero) digits is 1792, while the sum is 24.

The square root of 1400424720 is about 37422.2489970873. The cubic root of 1400424720 is about 1118.8020567311.

Adding to 1400424720 its reverse (274240041), we get a palindrome (1674664761).

The spelling of 1400424720 in words is "one billion, four hundred million, four hundred twenty-four thousand, seven hundred twenty".