1402899840 has 192 divisors, whose sum is σ = 5129710560. Its totient is φ = 352075776.

The previous prime is 1402899793. The next prime is 1402899847. The reversal of 1402899840 is 489982041.

It is a tau number, because it is divible by the number of its divisors (192).

It is a super-2 number, since 2×1402899840² = 3936255922144051200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1402899847) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 90757 + ... + 105083.

Almost surely, 2^1402899840 is an apocalyptic number.

1402899840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1402899840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2564855280).

1402899840 is an abundant number, since it is smaller than the sum of its proper divisors (3726810720).

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

1402899840 is a wasteful number, since it uses less digits than its factorization.

1402899840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14369 (or 14354 counting only the distinct ones).

The product of its (nonzero) digits is 165888, while the sum is 45.

The square root of 1402899840 is about 37455.3045642403. The cubic root of 1402899840 is about 1119.4607948722.

The spelling of 1402899840 in words is "one billion, four hundred two million, eight hundred ninety-nine thousand, eight hundred forty".