1851948 has 36 divisors (see below), whose sum is σ = 5350800. Its totient is φ = 529056.

The previous prime is 1851931. The next prime is 1851953. The reversal of 1851948 is 8491581.

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×1851948² = 6859422789408, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an Ulam number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3423 + ... + 3926.

2^1851948 is an apocalyptic number.

1851948 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

1851948 is an abundant number, since it is smaller than the sum of its proper divisors (3498852).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1851948 is a wasteful number, since it uses less digits than its factorization.

1851948 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7366 (or 7361 counting only the distinct ones).

The product of its digits is 11520, while the sum is 36.

The square root of 1851948 is about 1360.8629615064. The cubic root of 1851948 is about 122.8031751947.

The spelling of 1851948 in words is "one million, eight hundred fifty-one thousand, nine hundred forty-eight".