1997040770 has 32 divisors (see below), whose sum is σ = 3715683840. Its totient is φ = 771995520.

The previous prime is 1997040761. The next prime is 1997040817. The reversal of 1997040770 is 770407991.

It is a happy number.

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, 246809 + ... + 254771.

It is an arithmetic number, because the mean of its divisors is an integer number (116115120).

Almost surely, 2^1997040770 is an apocalyptic number.

1997040770 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1997040770 is a deficient number, since it is larger than the sum of its proper divisors (1718643070).

1997040770 is a wasteful number, since it uses less digits than its factorization.

1997040770 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8810.

The product of its (nonzero) digits is 111132, while the sum is 44.

The square root of 1997040770 is about 44688.2621053896. The cubic root of 1997040770 is about 1259.2993438040.

The spelling of 1997040770 in words is "one billion, nine hundred ninety-seven million, forty thousand, seven hundred seventy".