1021757340 has 48 divisors (see below), whose sum is σ = 2863099008. Its totient is φ = 272261184.

The previous prime is 1021757333. The next prime is 1021757353. The reversal of 1021757340 is 437571201.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 1021757298 and 1021757307.

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, 83239 + ... + 94721.

It is an arithmetic number, because the mean of its divisors is an integer number (59647896).

Almost surely, 2^1021757340 is an apocalyptic number.

1021757340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1021757340 is an abundant number, since it is smaller than the sum of its proper divisors (1841341668).

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

1021757340 is a wasteful number, since it uses less digits than its factorization.

1021757340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12978 (or 12976 counting only the distinct ones).

The product of its (nonzero) digits is 5880, while the sum is 30.

The square root of 1021757340 is about 31964.9392303505. The cubic root of 1021757340 is about 1007.2004753803.

The spelling of 1021757340 in words is "one billion, twenty-one million, seven hundred fifty-seven thousand, three hundred forty".