1021672740 has 48 divisors (see below), whose sum is σ = 3120747840. Its totient is φ = 247678080.

The previous prime is 1021672739. The next prime is 1021672763. The reversal of 1021672740 is 472761201.

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 = 1021672698 and 1021672707.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 773335 + ... + 774654.

It is an arithmetic number, because the mean of its divisors is an integer number (65015580).

Almost surely, 2^1021672740 is an apocalyptic number.

1021672740 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1021672740 is an abundant number, since it is smaller than the sum of its proper divisors (2099075100).

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

1021672740 is a wasteful number, since it uses less digits than its factorization.

1021672740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1548012 (or 1548010 counting only the distinct ones).

The product of its (nonzero) digits is 4704, while the sum is 30.

The square root of 1021672740 is about 31963.6158780574. The cubic root of 1021672740 is about 1007.1726763754.

The spelling of 1021672740 in words is "one billion, twenty-one million, six hundred seventy-two thousand, seven hundred forty".