1864149434 has 32 divisors (see below), whose sum is σ = 3286732800. Its totient is φ = 792593424.

The previous prime is 1864149421. The next prime is 1864149439. The reversal of 1864149434 is 4349414681.

It is a super-2 number, since 2×1864149434² = 6950106224565040712, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1864149439) 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, 76424 + ... + 97820.

It is an arithmetic number, because the mean of its divisors is an integer number (102710400).

Almost surely, 2^1864149434 is an apocalyptic number.

1864149434 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

1864149434 is a deficient number, since it is larger than the sum of its proper divisors (1422583366).

1864149434 is a wasteful number, since it uses less digits than its factorization.

1864149434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21547 (or 21533 counting only the distinct ones).

The product of its digits is 331776, while the sum is 44.

The square root of 1864149434 is about 43175.7968542562. The cubic root of 1864149434 is about 1230.7227853565.

The spelling of 1864149434 in words is "one billion, eight hundred sixty-four million, one hundred forty-nine thousand, four hundred thirty-four".