1357454640 has 80 divisors (see below), whose sum is σ = 4218703200. Its totient is φ = 361076736.

The previous prime is 1357454633. The next prime is 1357454653. The reversal of 1357454640 is 464547531.

It is a happy number.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 91246 + ... + 105074.

It is an arithmetic number, because the mean of its divisors is an integer number (52733790).

Almost surely, 2^1357454640 is an apocalyptic number.

1357454640 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 1357454640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2109351600).

1357454640 is an abundant number, since it is smaller than the sum of its proper divisors (2861248560).

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

1357454640 is a wasteful number, since it uses less digits than its factorization.

1357454640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14254 (or 14248 counting only the distinct ones).

The product of its (nonzero) digits is 201600, while the sum is 39.

The square root of 1357454640 is about 36843.6512848550. The cubic root of 1357454640 is about 1107.2400224083.

The spelling of 1357454640 in words is "one billion, three hundred fifty-seven million, four hundred fifty-four thousand, six hundred forty".