1403778964 has 48 divisors (see below), whose sum is σ = 3008855808. Its totient is φ = 559899648.

The previous prime is 1403778949. The next prime is 1403778967. The reversal of 1403778964 is 4698773041.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1403778967) 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 15 ways as a sum of consecutive naturals, for example, 5629 + ... + 53284.

It is an arithmetic number, because the mean of its divisors is an integer number (62684496).

Almost surely, 2^1403778964 is an apocalyptic number.

1403778964 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

1403778964 is an abundant number, since it is smaller than the sum of its proper divisors (1605076844).

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

1403778964 is a wasteful number, since it uses less digits than its factorization.

1403778964 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58984 (or 58982 counting only the distinct ones).

The product of its (nonzero) digits is 1016064, while the sum is 49.

The square root of 1403778964 is about 37467.0383670767. The cubic root of 1403778964 is about 1119.6945819002.

The spelling of 1403778964 in words is "one billion, four hundred three million, seven hundred seventy-eight thousand, nine hundred sixty-four".