2730400690 has 8 divisors (see below), whose sum is σ = 4914721260. Its totient is φ = 1092160272.

The previous prime is 2730400667. The next prime is 2730400703. The reversal of 2730400690 is 960040372.

It can be written as a sum of positive squares in 2 ways, for example, as 2618061889 + 112338801 = 51167^2 + 10599^2 .

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

It is a super-3 number, since 3×2730400690³ (a number of 29 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 136520025 + ... + 136520044.

Almost surely, 2^2730400690 is an apocalyptic number.

2730400690 is a deficient number, since it is larger than the sum of its proper divisors (2184320570).

2730400690 is a wasteful number, since it uses less digits than its factorization.

2730400690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 273040076.

The product of its (nonzero) digits is 9072, while the sum is 31.

The square root of 2730400690 is about 52253.2361677246. The cubic root of 2730400690 is about 1397.6833608506.

The spelling of 2730400690 in words is "two billion, seven hundred thirty million, four hundred thousand, six hundred ninety".