2278399629 has 12 divisors (see below), whose sum is σ = 3339142688. Its totient is φ = 1380848040.

The previous prime is 2278399609. The next prime is 2278399631. The reversal of 2278399629 is 9269938722.

It is not a de Polignac number, because 2278399629 - 2¹² = 2278395533 is a prime.

It is a super-2 number, since 2×2278399629² = 10382209738854675282, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2278399609) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3137929 + ... + 3138654.

Almost surely, 2^2278399629 is an apocalyptic number.

It is an amenable number.

2278399629 is a deficient number, since it is larger than the sum of its proper divisors (1060743059).

2278399629 is a wasteful number, since it uses less digits than its factorization.

2278399629 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6276608 (or 6276597 counting only the distinct ones).

The product of its digits is 5878656, while the sum is 57.

The square root of 2278399629 is about 47732.5845623302. The cubic root of 2278399629 is about 1315.8608538206.

The spelling of 2278399629 in words is "two billion, two hundred seventy-eight million, three hundred ninety-nine thousand, six hundred twenty-nine".