1802157274 has 4 divisors (see below), whose sum is σ = 2703235914. Its totient is φ = 901078636.

The previous prime is 1802157257. The next prime is 1802157281. The reversal of 1802157274 is 4727512081.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 1281998025 + 520159249 = 35805^2 + 22807^2 .

It is a super-2 number, since 2×1802157274² = 6495541680462222152, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 450539317 + ... + 450539320.

Almost surely, 2^1802157274 is an apocalyptic number.

1802157274 is a deficient number, since it is larger than the sum of its proper divisors (901078640).

1802157274 is an equidigital number, since it uses as much as digits as its factorization.

1802157274 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 901078639.

The product of its (nonzero) digits is 31360, while the sum is 37.

The square root of 1802157274 is about 42451.8229761691. The cubic root of 1802157274 is about 1216.9261671868.

It can be divided in two parts, 180215 and 7274, that added together give a square (187489 = 433²).

The spelling of 1802157274 in words is "one billion, eight hundred two million, one hundred fifty-seven thousand, two hundred seventy-four".