1404665740 has 24 divisors (see below), whose sum is σ = 3021746112. Its totient is φ = 548161920.

The previous prime is 1404665737. The next prime is 1404665747. The reversal of 1404665740 is 475664041.

It is a super-2 number, since 2×1404665740² = 3946171682259495200, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1404665740.

It is not an unprimeable number, because it can be changed into a prime (1404665747) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 855684 + ... + 857323.

It is an arithmetic number, because the mean of its divisors is an integer number (125906088).

Almost surely, 2^1404665740 is an apocalyptic number.

1404665740 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1404665740 is an abundant number, since it is smaller than the sum of its proper divisors (1617080372).

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

1404665740 is a wasteful number, since it uses less digits than its factorization.

1404665740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1713057 (or 1713055 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 37.

The square root of 1404665740 is about 37478.8705806352. The cubic root of 1404665740 is about 1119.9303049744.

The spelling of 1404665740 in words is "one billion, four hundred four million, six hundred sixty-five thousand, seven hundred forty".