1409400816 has 40 divisors (see below), whose sum is σ = 3650172624. Its totient is φ = 468610560.

The previous prime is 1409400779. The next prime is 1409400821. The reversal of 1409400816 is 6180049041.

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, 17925 + ... + 56036.

Almost surely, 2^1409400816 is an apocalyptic number.

1409400816 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1409400816 is an abundant number, since it is smaller than the sum of its proper divisors (2240771808).

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

1409400816 is a wasteful number, since it uses less digits than its factorization.

1409400816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74369 (or 74363 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 33.

The square root of 1409400816 is about 37541.9873741388. The cubic root of 1409400816 is about 1121.1873080710.

Adding to 1409400816 its reverse (6180049041), we get a palindrome (7589449857).

The spelling of 1409400816 in words is "one billion, four hundred nine million, four hundred thousand, eight hundred sixteen".