2691240938 has 8 divisors (see below), whose sum is σ = 4060196388. Its totient is φ = 1337842144.

The previous prime is 2691240931. The next prime is 2691240953. The reversal of 2691240938 is 8390421962.

It can be written as a sum of positive squares in 2 ways, for example, as 2299873849 + 391367089 = 47957^2 + 19783^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (2691240931) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3888731 + ... + 3889422.

Almost surely, 2^2691240938 is an apocalyptic number.

2691240938 is a deficient number, since it is larger than the sum of its proper divisors (1368955450).

2691240938 is a wasteful number, since it uses less digits than its factorization.

2691240938 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7778328.

The product of its (nonzero) digits is 186624, while the sum is 44.

The square root of 2691240938 is about 51877.1716461104. The cubic root of 2691240938 is about 1390.9692423896.

The spelling of 2691240938 in words is "two billion, six hundred ninety-one million, two hundred forty thousand, nine hundred thirty-eight".