1400405280 has 48 divisors (see below), whose sum is σ = 4411278144. Its totient is φ = 373441280.

The previous prime is 1400405269. The next prime is 1400405291. The reversal of 1400405280 is 825040041.

It is an interprime number because it is at equal distance from previous prime (1400405269) and next prime (1400405291).

It is a tau number, because it is divible by the number of its divisors (48).

It is a super-2 number, since 2×1400405280² = 3922269896503756800, which contains 22 as substring.

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

It is a self number, because there is not a number n which added to its sum of digits gives 1400405280.

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, 1458276 + ... + 1459235.

It is an arithmetic number, because the mean of its divisors is an integer number (91901628).

Almost surely, 2^1400405280 is an apocalyptic number.

1400405280 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1400405280 is an abundant number, since it is smaller than the sum of its proper divisors (3010872864).

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

1400405280 is a wasteful number, since it uses less digits than its factorization.

1400405280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2917529 (or 2917521 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 24.

The square root of 1400405280 is about 37421.9892576544. The cubic root of 1400405280 is about 1118.7968798224.

The spelling of 1400405280 in words is "one billion, four hundred million, four hundred five thousand, two hundred eighty".