1402640240 has 40 divisors (see below), whose sum is σ = 3300445008. Its totient is φ = 554293760.

The previous prime is 1402640221. The next prime is 1402640293. The reversal of 1402640240 is 420462041.

1402640240 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (40).

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, 98981 + ... + 112260.

Almost surely, 2^1402640240 is an apocalyptic number.

1402640240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1402640240 is an abundant number, since it is smaller than the sum of its proper divisors (1897804768).

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

1402640240 is a wasteful number, since it uses less digits than its factorization.

1402640240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 211337 (or 211331 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 23.

The square root of 1402640240 is about 37451.8389401642. The cubic root of 1402640240 is about 1119.3917402989.

The spelling of 1402640240 in words is "one billion, four hundred two million, six hundred forty thousand, two hundred forty".