1400777840 has 80 divisors (see below), whose sum is σ = 4060454400. Its totient is φ = 436604160.

The previous prime is 1400777821. The next prime is 1400777867. The reversal of 1400777840 is 487770041.

It is a tau number, because it is divible by the number of its divisors (80).

It is a junction number, because it is equal to n+sod(n) for n = 1400777794 and 1400777803.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 107540 + ... + 119859.

It is an arithmetic number, because the mean of its divisors is an integer number (50755680).

Almost surely, 2^1400777840 is an apocalyptic number.

1400777840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1400777840 is an abundant number, since it is smaller than the sum of its proper divisors (2659676560).

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

1400777840 is a wasteful number, since it uses less digits than its factorization.

1400777840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 227430 (or 227424 counting only the distinct ones).

The product of its (nonzero) digits is 43904, while the sum is 38.

The square root of 1400777840 is about 37426.9667485892. The cubic root of 1400777840 is about 1118.8960849154.

The spelling of 1400777840 in words is "one billion, four hundred million, seven hundred seventy-seven thousand, eight hundred forty".