1351423640 has 64 divisors (see below), whose sum is σ = 3658003200. Its totient is φ = 438956928.

The previous prime is 1351423639. The next prime is 1351423643. The reversal of 1351423640 is 463241531.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1351423643) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 121694 + ... + 132333.

It is an arithmetic number, because the mean of its divisors is an integer number (57156300).

Almost surely, 2^1351423640 is an apocalyptic number.

1351423640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1351423640 is an abundant number, since it is smaller than the sum of its proper divisors (2306579560).

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

1351423640 is a wasteful number, since it uses less digits than its factorization.

1351423640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 254064 (or 254060 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 29.

The square root of 1351423640 is about 36761.7143234643. The cubic root of 1351423640 is about 1105.5978119679.

The spelling of 1351423640 in words is "one billion, three hundred fifty-one million, four hundred twenty-three thousand, six hundred forty".