1970953640 has 64 divisors (see below), whose sum is σ = 4579061760. Its totient is φ = 763015680.

The previous prime is 1970953631. The next prime is 1970953643. The reversal of 1970953640 is 463590791.

It is a hoax number, since the sum of its digits (44) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 1970953591 and 1970953600.

It is not an unprimeable number, because it can be changed into a prime (1970953643) 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, 203549 + ... + 213011.

It is an arithmetic number, because the mean of its divisors is an integer number (71547840).

Almost surely, 2^1970953640 is an apocalyptic number.

1970953640 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 1970953640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2289530880).

1970953640 is an abundant number, since it is smaller than the sum of its proper divisors (2608108120).

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

1970953640 is a wasteful number, since it uses less digits than its factorization.

1970953640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9642 (or 9638 counting only the distinct ones).

The product of its (nonzero) digits is 204120, while the sum is 44.

The square root of 1970953640 is about 44395.4236380283. The cubic root of 1970953640 is about 1253.7919285905.

The spelling of 1970953640 in words is "one billion, nine hundred seventy million, nine hundred fifty-three thousand, six hundred forty".